Re: [sparta-users] Grid2Paraview issues

[Steve P. <sj...@gm...>]

Hi - possibly this is something Tom Otohal could look into.

Steve

On Tue, Oct 28, 2025 at 11:25 AM Nnaemeka Anyamele via sparta-users <
spa...@li...> wrote:

> Hi
>
> I'm back with an noticed issue somewhere in the workflow regarding the
> post processing of flowfield (grid) data.
>
> Everything works fine in the 20Jan2025 release of SPARTA, however upon
> migrating to the 24Sep2025 release, I'm unable to run grid2paraview.py
> successfully... (Note, surf2paraview.py ran fine)
>
> Here's what the terminal output looked like after running the same runcase
> in 20Jan2025:
>
> Processing  36  grid chunk(s).
> Completed grid chunk number:  15
> Completed grid chunk number:  12
> Completed grid chunk number:  20
> Completed grid chunk number:  17
> Completed grid chunk number:  14
> Completed grid chunk number:  23
> Completed grid chunk number:  18
> Completed grid chunk number:  22
> Completed grid chunk number:  19
> Completed grid chunk number:  21
> Completed grid chunk number:  13
> Completed grid chunk number:  16
>
> However if I run the case in 24Sep2025 (i.e. same input file, same
> geometry, same collision parameter file, etc. same paraview download
> (5.7.0) so the same pvpython file, but different SPARTA release), then the
> terminal hangs after this warning is printed:
>
> Processing  36  grid chunk(s).
> /home/engs2351/paraview/ParaView-5.7.0/lib/python3.7/multiprocessing/semaphore_tracker.py:55:
> UserWarning: semaphore_tracker: process died unexpectedly, relaunching.
> Some semaphores might leak.
>   warnings.warn('semaphore_tracker: process died unexpectedly, '
> ^C
>
> And nothing happens until I press Ctrl+C to abort the task, after which
> the following errors are printed
>
> Loguru caught a signal: SIGINT
>
> Loguru caught a signal: SIGINT
> Stack trace:
> 27            0x401f7d ../../../paraview/ParaView-5.7.0/bin/pvpython()
> [0x401f7d]
> 26      0x78acab42a28b __libc_start_main + 139
> 25      0x78acab42a1ca /lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca)
> [0x78acab42a1ca]
> 24            0x4024b4 ../../../paraview/ParaView-5.7.0/bin/pvpython()
> [0x4024b4]
> 23      0x78aca8208b24 vtkPythonInterpreter::PyMain(int, char**) + 756
> 22      0x78aca0fd7af3 Py_Main + 35
> 21      0x78aca0fd78a7
> /home/engs2351/paraview/ParaView-5.7.0/bin/../lib/libpython3.7m.so.1.0(+0x1d78a7)
> [0x78aca0fd78a7]
> 20      0x78aca0fb5815 PyRun_SimpleFileExFlags + 229
> 19      0x78aca0fb56a2 PyRun_FileExFlags + 178
> 18      0x78aca0f81b5b PyEval_EvalCode + 27
> 17      0x78aca0f81b2e PyEval_EvalCodeEx + 62
> 16      0x78aca0f819fc _PyEval_EvalCodeWithName + 2780
> 15      0x78aca0e71fec _PyEval_EvalFrameDefault + 35116
> 14      0x78aca0e68610
> /home/engs2351/paraview/ParaView-5.7.0/bin/../lib/libpython3.7m.so.1.0(+0x68610)
> [0x78aca0e68610]
> 13      0x78aca0e71fec _PyEval_EvalFrameDefault + 35116
> 12      0x78aca0e98286 _PyFunction_FastCallKeywords + 166
> 11      0x78aca0f819fc _PyEval_EvalCodeWithName + 2780
> 10      0x78aca0e71fec _PyEval_EvalFrameDefault + 35116
> 9       0x78aca0e98286 _PyFunction_FastCallKeywords + 166
> 8       0x78aca0f819fc _PyEval_EvalCodeWithName + 2780
> 7       0x78aca0e7138b _PyEval_EvalFrameDefault + 31947
> 6       0x78aca0ea0ea9 _PyMethodDescr_FastCallKeywords + 73
> 5       0x78aca0e98783 _PyMethodDef_RawFastCallKeywords + 755
> 4       0x78aca1010d0a
> /home/engs2351/paraview/ParaView-5.7.0/bin/../lib/libpython3.7m.so.1.0(+0x210d0a)
> [0x78aca1010d0a]
> 3       0x78aca0fc18d8 PyThread_acquire_lock_timed + 488
> 2       0x78acab4a4fb8 /lib/x86_64-linux-gnu/libc.so.6(+0xa4fb8)
> [0x78acab4a4fb8]
> 1       0x78acab498d71 /lib/x86_64-linux-gnu/libc.so.6(+0x98d71)
> [0x78acab498d71]
> 0       0x78acab445330 /lib/x86_64-linux-gnu/libc.so.6(+0x45330)
> [0x78acab445330]
> (  74.682s) [main thread     ]
>
> I have tried running the data from the 20Jan2025 run case with the
> grid2paraview.py from 24Sep2025 release and it still didn't work, so it's
> not an issue with the data output of the 24Sept2025... it's an issue with
> the grid2paraview.py specifically of the 24Sep2025 release...
>
> I will have also logged this on the github.
>
> Looking forward to a solution!
>
> Many thanks!
> Nnaemeka
> _______________________________________________
> sparta-users mailing list
> spa...@li...
> https://lists.sourceforge.net/lists/listinfo/sparta-users
>